Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_KERNEL_VTIME_H
2#define _LINUX_KERNEL_VTIME_H
3
4struct task_struct;
5
6#ifdef CONFIG_VIRT_CPU_ACCOUNTING
7extern void vtime_task_switch(struct task_struct *prev);
8extern void vtime_account_system(struct task_struct *tsk);
9extern void vtime_account_system_irqsafe(struct task_struct *tsk);
10extern void vtime_account_idle(struct task_struct *tsk);
11extern void vtime_account_user(struct task_struct *tsk);
12extern void vtime_account(struct task_struct *tsk);
13#else
14static inline void vtime_task_switch(struct task_struct *prev) { }
15static inline void vtime_account_system(struct task_struct *tsk) { }
16static inline void vtime_account_system_irqsafe(struct task_struct *tsk) { }
17static inline void vtime_account(struct task_struct *tsk) { }
18#endif
19
20#ifdef CONFIG_IRQ_TIME_ACCOUNTING
21extern void irqtime_account_irq(struct task_struct *tsk);
22#else
23static inline void irqtime_account_irq(struct task_struct *tsk) { }
24#endif
25
26static inline void vtime_account_irq_enter(struct task_struct *tsk)
27{
28 /*
29 * Hardirq can interrupt idle task anytime. So we need vtime_account()
30 * that performs the idle check in CONFIG_VIRT_CPU_ACCOUNTING.
31 * Softirq can also interrupt idle task directly if it calls
32 * local_bh_enable(). Such case probably don't exist but we never know.
33 * Ksoftirqd is not concerned because idle time is flushed on context
34 * switch. Softirqs in the end of hardirqs are also not a problem because
35 * the idle time is flushed on hardirq time already.
36 */
37 vtime_account(tsk);
38 irqtime_account_irq(tsk);
39}
40
41static inline void vtime_account_irq_exit(struct task_struct *tsk)
42{
43 /* On hard|softirq exit we always account to hard|softirq cputime */
44 vtime_account_system(tsk);
45 irqtime_account_irq(tsk);
46}
47
48#endif /* _LINUX_KERNEL_VTIME_H */